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Automation Integration · head to head

Census vs Letta

Census logo

Census

Automation Integration

The reverse ETL infrastructure for data activation

From
Free
Rated
-
Full reviewWebsite
Letta logo

Letta

Automation Integration

Machines that learn

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Census census domain permanently redirects to Fivetran (301 redirect); Letta free tier limited to 3 stateful agents
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Census and Letta actually diverge.

Attributes where Census and Letta differ
AttributeCensusLetta
Pricing modelusage-basedfreemium
PlatformsWeb, ApiWeb
Founded2020Unknown

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Automation Integration).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Census

  • Reverse ETL
  • Data syncing
  • Transformation
  • Real-time activation
  • Error handling
  • Monitoring
  • Analytics
  • 150+ destinations

Only in Letta

Nothing recorded that Census does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Census

  • Syncing customer data from a warehouse into marketing and sales tools (reverse ETL)not Letta

Letta

  • Building agents with memory for continuous learningnot Census
  • Enabling reflection during idle periods via sleep-computenot Census
  • Managing agent context and extracting learningsnot Census

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Census

  • Census domain permanently redirects to Fivetran (301 redirect)
  • Exact per-tier pricing not listed; customers directed to contact sales or request quotes
  • Annual contracts offer up to 22% savings but discount terms not detailed
  • Usage rates vary by connection type; pricing examples show variance ($17–$202 for different sources)

Letta

  • Free tier limited to 3 stateful agents
  • Pro tier capped at 20 stateful agents
  • API Plan usage charges apply beyond base tier

Pricing, plan by plan

Census

Free
  • FreeFree
    • 500,000 monthly active rows (MAR) for connections
    • 3,500 MAR for activations
    • 5,000 monthly model runs (MMR) for transformations
  • Standard$null/month
    • Usage-based pricing for connections, transformations, activations
  • Enterprise$null/month
    • Greater flexibility and control
    • Custom pricing

Letta

Free
  • FreeFree
    • Limited agents
    • Limited Letta Auto usage
    • Bring your own API keys
  • Pro$20/month
    • Weekly and monthly Letta Auto quota
    • Pay-as-you-go overage
    • Up to 20 stateful agents
  • API Plan$20/month
    • Unlimited agents
    • $0.10/active agent/month
    • $0.00015/second for tool execution
  • Teams Pro$20/month
    • Per seat pricing
    • Add teammates
    • Letta Auto quota

Which should you pick?

Choose Census if

  • You need reverse etl.
  • You want to start without paying.
  • You work on Web, Api.
  • You also want data syncing.
Census review

Choose Letta if

  • You want to start without paying.
Letta review

Questions people ask

Is Census or Letta better?
Neither clearly leads. Census starts at Free and Letta at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Census or Letta?
Census starts at Free and Letta at Free.
Does Census or Letta run on more platforms?
Census runs on Web, Api. Letta runs on Web.
Can I use Census for free?
Both have a free tier, so you can try either at no cost before committing.
What is Census best used for?
Census is most often used for syncing customer data from a warehouse into marketing and sales tools (reverse etl). Of those, syncing customer data from a warehouse into marketing and sales tools (reverse etl) is not what Letta is typically brought in for.
What can Census do that Letta cannot?
Census covers Reverse ETL, Data syncing, Transformation, Real-time activation.

Answered from the vendors’ own pages

Census: What happened to Census.com?

Census (formerly getcensus.com) has been acquired by Fivetran. The domain permanently redirects (301) to fivetran.com. Census functionality is now part of Fivetran's data platform.

Source
Letta: How much does Letta cost?

Letta offers a free tier, then Pro plan at $20/month with up to 20 stateful agents, API Plan at $20/month base plus usage charges ($0.10/active agent/month, $0.00015/second for tool execution), and Teams Pro at $20/seat/month.

Source
Census: How much does Fivetran (formerly Census) cost?

Fivetran uses usage-based pricing. Free tier includes 500,000 monthly active rows (MAR) for connections, 3,500 MAR for activations, and 5,000 monthly model runs for transformations. Paid pricing depends on usage; example: Facebook Ads with 34,479 MAR costs $17.23/month; Snowflake-to-Salesforce with 12,007 MAR costs $202.01/month.

Source
Letta: How many agents can I create on the free plan?

The free tier is limited to 3 stateful agents. Pro plan allows up to 20 stateful agents, while API Plan offers unlimited agents.

Source
Census: Do Fivetran/Census offer discounts for annual commitments?

Yes, annual contracts offer up to 22% savings versus monthly pricing. Additional discounts are available for nonprofits, startups, and specific use cases.

Source
Letta: Does Letta charge for tool execution?

On the API Plan, Letta charges $0.00015 per second for tool execution. The Pro and Teams Pro plans include execution in their monthly fee.

Source
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